Grinder



C. JACKSON.

GRINDER.

APPLICATION FILED JUNE 11., 1919.

1,344, 33 Patented June 22, 1920. I

FIJI;

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CORWILL JACKSON, KALAMAZOO, MICHIGAN.

GRINDER.

Speciflcation of Lettersilatent.

Patented June. 22, 1920.

Application filed June 11, 1919. Serial No. 308,351.

signed by me as a valve grinder for internal combustion engines although desirable for use in other relations.

The main objects of this invention are,

First, to provide a fiuid motor driven grinder which is compact and simple in structure and easily manipulated.

Second, to provide a fluid motor driven grinder in which the parts are arranged so that they may be readily assembled and disassembled as occasion may require.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims;

A structure which is a preferrred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this specification, in which:

Figure I is a side view of the structure embodying the features of my invention.

Fig. II is a detail view partially in section on a line corresponding to line 2-2 of Fi IV.

ig. III is a detail sectional view on a line corresponding to line 33 of Fig. I showin details of the cylinder and rotor.

Fig. V is a horizontal section on a line corresponding to line 4-4 of Fig. II showin details of the spindle driving means. Ti V is a detail section on a line corresponfiing to line 5-5 of Fig. II.

In the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawin I provide a frame or body comprising a o having a recess-like chamber 2 on its upper side providing a gear box and a cylinder 3 on its under side. The cylinder is provided with an end plate 4 detachably secured to the body member by means of bolts 5. The top member 6 is detachably secured to the body member. and is provided witha hand piece 7 for the manipulation of. the grinder.

The fluid actuated impact rotor 8 is provided with pockets 9 on its upper face. The

rotor shaft 10 is supported by the bearing 11 in the end plate 4 and the bearing 12 in the wall between the rotor cylinder and the gear box. The inlet passage 13 is formed in the wall between the gear box and cylinder and preferably has an annular portion 14 at its inner end delivering to the cylinder. through its plurality of ports 15.

This inlet passage is controlled by valve 16 arranged in the bore-like casing 17 dy member 1 formed in the body at oneside, the valve bei ing of the plunger type and provided withan annular groove 19 adapted to be brought into register with passage 14 when valve'is actuated. The stem 20 of the valve is disposed through the top member 6 so as to be manipulated by the thumb of the operator while grasping the handle 7 The spring 16' holds the valve normally closed. 21 represents a flexible supply pipe connectedto suitable source of power. p

The body member has a spindle'bearing 22 disposed atone side of the cylinder. The.

spindle 23- is provided with a blade 24 adapted to engage a valve. 1

The shaft 10 of the rotor pro'ects into the movement is communicated to the spindle,

The exhaust port 30 is also formed in the body member between the cylinder and gear bOX.

With this arrangement of parts I provide a fluid driven grinder which is compact in structure light in weight and conveniently manipulated.

My improved grinder is well adapted for use in garages, most of which have means for providing air under pressure and many of which have no electrical power means for operating electrically driven grinders such as shown in my application, Serial No. 231,301 filed 'April 29, 1 918. My present embodiment is an adaptation of and embodying certain features of my invention shown in such application.

I have illustrated and described In improvements in an embodiment which find very practical. I have not attempted to illustrate or describe other adaptations or embodiments as I believe the disclosure made will enable those skilled in the art to which my invention relates to embody and adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. The combination of a body member having a gear box on its upper side, a rotor cylinder on its under side and inlet and exhaust passages in the wall between said gear box and cylinder, the inlet passage having an annular portion communicating with said cylinder through a plurality of ports, an end plate for said cylinder mounted on the 1 under side of said body provided with a shaft bearing, a top member constituting a cover for said gear box provided with a hand piece, a spindle hearing at the side of said cylinder and a shaft bearing in the wall between said cylinder and gear box, an upwardly facing fluid actuated impact rotor prdvided with a shaft disposed in said bearings in said wall and end plate and projecting into said gear box, a pinion on said shaft, a spindle disposed in said spindle bearing, a stud shaft mounted on said top member, a spindle driving gear on said stu shaft meshing with said pinion, and a valve carried by said body member for controlling said inletpassage havin a stem projecting through said top mem er.

2. The combination of a body member havin a gear box on its upper side, a rotor cylin er on its under side and inlet and exhaust passages in the wall between said gear box and cylinder, the inlet passage having an annular portion communicatin with said cylinder through a plurality 0 ports, a top member constituting .a cover for said gear box provided with a hand piece, a spindle at the side of'said cylinder, an upwardly facing fluid actuated impact rotor provided with a shaft projecting into said gear box, a pinion on saidshaft, a spindle riving gear meshing with said pinion, and a valve carried b said body member for controlling said in ct passage having a stem projecting through said top member.

3. The combination of a body member havin a gear box on its upper side, a rotor cylin er on its under side and inlet and exhaust passa es, an end plate for said 0 linder mounte on the under side of said ody provided with a shaft bearing, a top member constituting a cover for said gear box provided with a hand piece, a spindle bearing at the side of said cylinder and a shaft bearing in the wall between said cylinder and gear box, an upwardly facing fluid actuated impact rotor provided with a shaft disposed in said bearings in said wall and end plate and projecting into said gear box, a pinion on said shaft, a spindle disposed in said spindle bearing, a stub shaft mounted on said top member, a. spindle driving gear on said stub shaft meshing withsaid pinion, and a valve carried by said body member for controlling said inlet passage having a stem projecting through said top member.

4. The combination of a body member having a gear box on its upper side, a rotor cylinder on its under side and inlet and exhaust passages, a top member constituting a cover for said ear box provided with a hand piece, a spindle at the side of said cylinder, an upwardly facing fluid actuated impact rotor provided with a shaft projecting into said gear box, a pinion on said shaft, a spindle driving gear meshing with said pinion, and a valve carried by said body member for controlling said inlet pas sage having a stem projecting through said top member.

5. The combination of a body member having a gear box, a rotor cylinder and inlet and exhaust passages, an end plate for said cylinder provided with a shaft bearing, a cover for said gear box, a spindle bearing at the side of said cylinder and a shaft bearing in the wall between saidcylinder and ear box, a fluid actuated impact rotor provided with a shaft dis osed in said, bearings in said wall and end plate and projecting into said gear box, a pinion on said shaft, a spindle disposed in said spindle bearin a stub shaft mounted on said cover mem er, and a spindle driving gear on said stub shaft meshing with said pinion.

6. The combination of a body member having a gear box, a rotor cylinder and inlet and exhaust passages in the wall between said gear box and cylinder, the inlet passage having an annular portion communieating with said cylinder through a plurality of ports, a spindle at the side of said cylinder, a fluid actuated impact rotor provided with a shaft projecting into said gear box,a pinion on said shaft, a spindle driv with said cylinder through a plurality of 10 ing gear meshing with said pinion, and a ports, a spindle at the side of said cylinder, valve carried by said body member for cona fluid actuated impact rotor provided with trolling said inlet passage. a shaft projectinginto said gear box, a pin- 7 The combination of a body member ion on said shaft, and a spindle driving gear having a gear box, a rotor c linder and inlet meshing with said pinion. 15

and exhaust passages in t e wallbetween In witness whereof, Ihave hereunto set said gear box and cylinder, the inlet passage my hand and seal. having an annular portion communicating CORWILL JACKSON. [Ls] 

